This issue disappears when I change the last line of /usr/share/bash-completion/completions/apt-file from: > complete -f -F _apt_file apt-file to: > complete -F _apt_file apt-file
After this fix, completion works for the usual apt-file actions. However, it seems that completion hasn't been implemented for several features of apt-file (such as list-indices or --filter-suites). Maybe the purpose of the -f flag is to provide fallback completion for them? -- Samuel Plavec
